Red-lead furnace.



Patented Dec. 3|, M.

H M. GABEL &. T. E. KEARNS.

RED LEAD FURNACE.

(A lication filed Sept. 16 1901.)

(No Model.)

2 maaml W n: mmms PETERS ca. mormurna. WASHINDTON. n. c.

UNiTED STATES P TENT OFFICE.

HENRY M. GABEL, OF CINCINNATI, OHIO, AND THOMAS E. KEARNS, OF

' NEW KENSINGTON, PENNSYLVANIA. I

RED-LEAD FURNACE.

SPECIFICATION forming part Of Letters Patent NO. 689,868, dated December 31, 1901.

Application filed September 16, 1901. Serial No. 751493- (No model.)

To aZZ whom it may concern.-

Be it known that we, HENRY M. GABEL, re: siding at Cincinnati, Hamilton county, Ohio, (post-ofiice address No. 3320 Reading road, Avondale, Cincinnati, Ohio,) and THOMAS E. KEARNS,-residing at New Kensington, Westmoreland county, Pennsylvania, (post-office address New Kensington, Pennsylvania,) citizens of the United States, have invented certain new and useful Improvements in Red- Lead or Litharge Furnaces, of which the following is a specification.

This invent-ion, pertaining to improvements in furnaces for the coloring of casing in the production of red lead or litharge, will be readily understood from the following description, taken in connection with the accompanying drawings, in which.-

Figure 1 is a side elevation, Fig. 2 a vertical longitudinal section, Fig. 3 an end view, and Fig. 4 a vertical transverse section, of our improved furnace.

In the drawings, 1 indicates a pair of shafts disposed horizontally and parallel with each other in suitable bearings near the base of the general structure; 2, flanged carryingwheels fast on the ends of these shafts; 3, a shaft at right angles for the shafts 1; 4, bevelgearing connecting shaft 3 with one or, if desired, both of shafts 1, shaft 3 to be driven from any suitable source of power; 5, a metallic cylinder lined with refractory material and disposed with its horizontal axis over and between the two shafts 1;,6, metallic hoops upon the cylinder 5, the same engaging the flanged wheels 2 in such manner that the turning of shaft 3 results in the rotation of the cylinder; 7, a charging-door in the periphery of the cylinder; 8, a discharging-door disposed in the end of the cylinder and as far outward radially as the inner diameter of the cylinder will permit; 9,*a large circular opening in that end of the cylinder'farthest from discharge-door 8; 10, a gas-discharge out-let disposed axially in the opposite end of the cylinder; 11, a flue having connection with outlet 10; 12, a fuel-furnace disposed near that end of the cylinder opposite fine 11; 13, its grate; 14, its fire-door; 15, its ash-door; 16, a boss projecting from furnace 12 into the opening 9 of the cylinder; 17, a passage-way throughthis boss whereby the combustionchamber of furnace 12 is placed in communication with the interior of the cylinder; 18, annular shields within the cylinder around openings 10 and 17; 19, a flue in the wall of furnace 12; 20, a segmental series of ports in the cylinder end of boss 16, these ports communicatingwith flue 19; 21, a blower; 22, a connection from the blower to flue 19; 23, a pair of wheeled axles on furnace 12, with their axes at right angles to the axis of cylinder 5, and 24: a track for the wheels of the furnace, the same extending rearwardly from the cylinder.

In using this apparatus the dross or casing is charged into the cylinder 5 through door 7 till the cylinder is about one-sixth full, the apparatus being preferably of a capacity to make such charge equal about two tons. The cylinder is then rotated at, say, about one revolution per minute for about ten hours, or more if needed. The hot products of combustion from furnace 12 pass into the cylinder and act upon the tumbling drossor casing therein and finally escape through flue 11. At the same time air under pressure and heated by passage through the hot walls of the furnace enters the cylinder and acts upon the dross or casing therein, the heat and air ultimately bringing about the coloring desired for the red lead or litharge. When the process is complete, then the blast is shut off and the charge withdrawn through opening 8. After each discharging or at such less frequent intervals as may render it desirable the furnace 12 is wheeled away from the cylinder, thus leaving-the opening 9 free and open, so

that proper tools may be employed in thoroughly clearing the interior of the cylinder. Such operations through the opening 9 will in some cases be found desirable during the regular process of discharging the cylinder, as the position of the opening gives fair access to the entire inwall of the cylinder. In some cases such thorough clearing of the cylinder as calls for the employment of opening 9 as a cleaningope'ning may be only occasional.

Shields 18 serve to keep the tumbling dross or casing out of openings 10 and 17 while the cylinder is revolving.

This apparatus may be used singly or in battery, and in practice should be provided with overhead track for charging-cars and with receiving-conveyor for the withdrawn charges.

We claim as our invention- 1. In a red-lead orlitharge furnace, the combination, substantially as set forth, of a horizontally-disposed refractory-lined rotary cylinder having axial openings in each of its ends and having charging and discharging openings, mechanism for supporting and rotating said cylinder, a discharge-flue connection at one of said axial openingsin the cylinder, a fuel-furnace, a fixed boss engaging the other axial opening in the cylinder and having a passage through it connecting with said fuel-furnace, ports in said boss within said cylinder, a flue disposed within the brickwork of the furnace and communicating with said ports, and an air-blast apparatus connected with said last-mentioned flue.

2. In ared-lead orlitharge furnace, the combination, substantiallyas set forth, of a horisaid wheels.

HENRY M. GABEL. THOMAS E. KEARNS. Witnesses as to Gabel:

FRANK H. SHAFFER, ARTHUR WEBER. \Vitnesses as to Kearns: JOHN N. AKER, C. R. ALTER. 

